package oj;

import java.util.Scanner;

public class Day29S {
    public static void main(String[] args) {
        Scanner sc=new Scanner(System.in);
        while(sc.hasNext()){
            int n=sc.nextInt();
            if(n==0){
                break;
            }
            int count=0;
            while(n>=2){
                n=(int)Math.ceil((double)n/3);//分三分之后取最大的
                count++;
            }
            System.out.println(count);
        }
    }
}
